The Call Of The Wild by Mitsu Yamamoto

A strong, pampered dog is stolen from his comfortable California home and thrust into the brutal life of sledding in the Yukon during the Klondike Gold Rush; forced by hunger, cruelty, and competition to rely on instinct, he learns pack rules, fights a deadly rival, rises to leadership, and forms a deep bond with a compassionate prospector before ultimately answering an ancestral call to the wild, completing his transformation from domestic pet to primordial leader.